Charak Samhita
स्फिक्पूर्वा कटिपृष्ठोरुजानुजङ्घापदं क्रमात् । गृध्रसी स्तम्भरुक्तोदैर्गृह्णाति स्पन्दते मुहुः ॥५६॥
॥ Gridhrasi (sciatica) and khalli (radiculopathy)॥ Gridhrasi due to vata is manifested as; stiffness, ache and pricking pain in the course of gluteal region, hip and posterior aspect of thigh, knee, calf and soles and twitching infrequently.
english translation
sphikpUrvA kaTipRSThorujAnujaGghApadaM kramAt । gRdhrasI stambharuktodairgRhNAti spandate muhuH ॥56॥
hk transliteration by Sanscript